Improvement in machine poe geinding and polishing articles of metal



@atten fates @anni ffitc.

J. ALBERT WHELPLEY, *0F GREENW1GH, NEWBRUNSWIGK.-

t" Laan maar No. 72,951, dans. netta-aa 31, 18er.

i IMPROVEMENT IN MACHINE FONGNINDING AND PoLIsiINe'AnTIcLns or METAL.

dln .tlgthnle referat tu iu tigen tttirt tant mn' making mut nf the same.

TO ALL WHOM IT MAY CON CERN Be it known that I,J. Annnnr WHELPLEY, of Greenwich, in the Province of New Brunswick, have invented a new and improved Machine for Grinding and Polishing Met'alArticles'; and I do'hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and usc the same, reference being had to the accompanying drawings, forming pa'rt of this specification, invwhich Figure 1 is a front elevation of my-invention. Figure 2, a transverse.vertical` section of the' same, taken in the line x, tig. 1. Figure 3, a horizontal sectionof the same, taken in the line yy, iig. 1. Similarletters of reference indicate corresponding parts. This invention relates to a new an'd improv-ed machine for grinding and polishing metal articles which have two finished sides of the same shape or form, as, for instance, skate-runnersrazor and knife-blades, saws', 55o. The invention consists in the employment or use of two grindstones or polishing-wheels fitted in adjustable frames, and used in connection with a rest, and also, in certaincases, withameans for vibrating the article to lbe operated upon, all arranged in such a'rmanner thatv metal articles may be ground and polished with much greaterfacility than heretofore, and `the stones or polishing-wheels also kept much truer or made to wear in a more even manner than by the ordinary mode of grinding and polishing. Y A represents a framing, which may be constructed in any proper manner, to support the working parts, and B B are two horizontal' parallel ways, secured permanently in said framing,'and having two adjustable or sliding frames C. C fitted on them, one frame, C, being moved bya screw,'D, or its equivalent, and th'efother, C', by a foot-treadle, E, which is connected to Ci'by a cord, F, passing around pulleys a a a, (see figs. 1 and In the frames C C there are placed,honsuitable arbors b b, grindstones or polishing-wheels G G, a stone or wheel being in each -frame, and both stones or wheels in the same plane. 'lheA stones or wheels are made to rotate in reverse directions by means of belts H H froma driving-shaft, I, on the top .of the framing A, II` being a cross-belt. J is a rest placed-between the two stones orwheels G G, and having` its ends fitted in uprights K K, which are adjusted by screws c "c, as shown clearlyA in iig. 2. By-this means the rest J may b e raisedor lowered, as required, the work or article to be ground orpolish'ed being. .placed on the rest, andcon sequently raised or lowered, as circumstances may require. K is a shaft placed on the framing parallel with shaft I, and having a crank-wheel, L, at one end of it. M is a pitman, which connects -the crank-wheel l L with an arm, N, projectiugfroma shaft, O, which is fitted in the framing A, at right angles with the arbors of the grindstones or polishing-wheels, said shaft O having a pendant, P, attached to it, to the lower end of which one end'of thev article is secured by any suitable fastening. A

The operation is as follows: The-article to be ground or polished is fitted on the rest J, and connected atone end tothe pendant Motion is given the' driving-shaft I by any convenient power, the grindstones or wheels being rotated in the direction indicated by the arrows shown* in iig. 1; One stone or wheehG, is pressed 'against the article by the operator, who actuates for that purpose the treadle E, and thereby moves thei'rame C', which contains said stone or wheel, the stone or wheel G, in tlcother frame C, being only adjusted from time to time tosuit the thickness of the article to be operatedupon. By this arrangement it will be seen that' the article to be ground or polished-will be eil'ectually acted upon by thetwo' stones or wheels G- G, and while thus acted upon, it has a reciprocating motion imparted to it in consequence of being connected by thependant P to the rock-shaft 0, the latter being operated from the shaft K by means of the crank-wheel and pitmau M. In certain cases the article to be ground or polished may be` operated or drawn' back and forth between the stones or wheels by hand instead of by thev mechanism described, but the latter would 'be preferable.' The parts, as above arranged,"are adaptedfor polishing articles having slightly concave sides, such, fox' instance, as skate-runners, razor-blades, &c.,' &`c. In grinding and polishing articles,.the sides of which are N planes, the former are passed between the stones or wheels in' a direction transversely with their arbore the parts being arranged with a viewl to' that end. In the framing A there is placed a horizontal board, Q, h'aving Athree holes, d d d', made in it, the cential onefd, beingfor the purpose `of dropping water through between the stones, and the others, dl d', for passing bars through to turn oil' the stones when they require iti By this simple device, articles may be ground or polished nt both sides simultanerusly, and in e far more perfect manner than can be done by placing the article by hand against; a, single stone. 'lhc stones or wheels will also Wear evenly, and will consequently not require to be turned off vc'lyfrequently, and the opor-afer or attendent will not bc annoyed by water being thrown upon him from the stones, as isnow theJ case.l

I claim as new, and desire to secure by Letters Potenti The combination of the two grindstones or polishing-wheels G G, rest J, rock-shaft O, and arm P, arranged and constructed as and for the purposes described. y v

J. ALBERT WHELPLEY.

Witnesses:

M. AHEARNESS, WM. TREUMB. 

